On November 21, Henan Kaijie Water Treatment Company's quotation for coal powder activated carbon is 4500 yuan per ton. The specifications of the coal powder activated carbon are: domestic products with a mesh size of 325, produced by Henan Kaijie Water Treatment Co., Ltd., in accordance with the enterprise standards and new specifications 700, 120. The validity period of this quotation is 7 days. The provider of the quoted information is Henan Kaijie Water Treatment Co., Ltd.